Final answer:
Tenderness due to tennis elbow is most likely experienced at the lateral humeral epicondyle and supracondylar ridge because these are the points where affected tendons attach and can become inflamed.
Step-by-step explanation:
A person with the overuse syndrome of tennis elbow would most likely experience tenderness with palpation at the lateral humeral epicondyle and the supracondylar ridge. This area is where the extensor muscles of the forearm attach, which are commonly involved in the repetitive motions leading to tennis elbow. Tennis elbow, known medically as lateral epicondylitis, is characterized by pain and inflammation of the tendons that join the forearm muscles on the outside of the elbow.
The lateral epicondyle is a bony prominence on the outside of the elbow where these tendons attach. Overuse or repetitive stress, particularly of the forearm muscles used in extending the wrist and fingers, leads to this condition. The supracondylar ridge is located above the lateral epicondyle and can also be a site of pain and tenderness due to its proximity to the affected tendons. Activities and jobs requiring repetitive and vigorous use of the forearm and hand, such as playing tennis, can increase the risk of developing this condition.